Remove markdown from issue selector

Was worth a try, but apparently markdown is not supported there.

.github/ISSUE_TEMPLATE/config.yml

@@ -5,7 +5,7 @@ contact_links:
     about: Your setup is not working and you need help or you have a question regarding PrivateBin
   - name: Problem with the container image
     url: https://github.com/PrivateBin/docker-nginx-fpm-alpine/issues/new
-    about: Please report all problems that apply **only** to the official (Docker) image `docker-nginx-fpm-alpine` here.
+    about: Please report all problems that apply only(!) to the official (Docker) image “docker-nginx-fpm-alpine” here.
   - name: Security issue
     url: https://github.com/PrivateBin/PrivateBin/security/policy
     about: Please report security vulnerabilities and other security issues here.